Do you have an 80mm instrument cut-out and want to install a 57mm instrument? Use this reducer mask. The hole circle diameters correspond to the usual dimensions, so the reduction mask can be used plug-and-play.
  
 Features:
 for 80mm round instrument openings
 Reduced to a 57mm cutout
 Subsequent mechanically well machinable
 Technical specifications
 80mm round instrument contour
 Standard bolt circle diameter of 89mm
 Standard bolt circle diameter of 67mm
 Temperature resistant up to 160° Celsius
 Polyamide PA6 with micro carbon fiber
 scope of delivery
 80mm to 57mm reduction mask